Eminently plausible. Turkey repeatedly refused John Kerry’s entreaties to block the Islamic State’s black market oil trade. See: here
Russia has accused Turkey of shooting down its warplane near the border with Syria in order to protect its oil trade with the Islamic State (IS) group.
Speaking at international talks on climate change in Paris, Russian President Vladimir Putin called the downing of the plane a “huge mistake”.
Turkey has denied any ties to Islamic State and is part of a US-led coalition carrying out air strikes against the militant group.
The Turkish government has refused to apologise for the incident.